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Pressure acid leaching-emulsion liquid membrane method for extracting nickel from laterite

A technology of emulsion liquid film and laterite ore, which is applied in the field of extracting nickel in laterite ore by pressurized acid leaching-emulsion liquid film method, can solve the problem of unfavorable emulsion liquid film application of acid leaching solution, high pH value of the external water phase, nickel Problems such as low ion concentration

Inactive Publication Date: 2014-12-24
无锡市森信精密机械厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There have been reports on the use of emulsion liquid membrane technology to extract nickel elements, but the concentration of nickel ions in the studied external phase system is low, and the pH value of the external water phase is high, which is not conducive to the application of emulsion liquid membrane method to the extraction of laterite ore. pickling solution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for extracting nickel from laterite ore by pressurized acid leaching-emulsion liquid membrane method, the process flow is:

[0028] (1) Pressurized sulfuric acid leaching

[0029] Laterite ore samples were added to the autoclave at a liquid-solid mass ratio of 6:1, and the leaching temperature was controlled to 250℃, the leaching time was 60min, and the acid-ore ratio was 0.45 for leaching; the mass concentration of nickel ions in the leaching solution was 1.81g / L, and acidity It is 30g / L. Because this emulsion liquid membrane system is more suitable for Ni 2+ For the treatment of wastewater with a mass concentration of less than 0.5g / L and low acidity, the leachate is diluted 3 times and then subjected to liquid membrane extraction.

[0030] (2) Extraction by emulsion liquid membrane method

[0031] 1) Milking: According to the volume ratio, Span80 is 5%, TBP is 4%, liquid paraffin is 2%, and kerosene is 89%. Add the agent to the milk maker, stir at 500r / min for 5min...

Embodiment 2

[0036] A method for extracting nickel from laterite ore by pressurized acid leaching-emulsion liquid membrane method, the process flow is:

[0037] (1) Pressurized sulfuric acid leaching

[0038] Laterite ore samples were added to the autoclave at a liquid-solid mass ratio of 5:1, and the leaching temperature was controlled to 225°C, the leaching time was 45 min, and the acid-ore ratio was 0.4 for leaching; the mass concentration of nickel ions in the leaching solution was 1.81g / L, acidity It is 30g / L. Because this emulsion liquid membrane system is more suitable for Ni 2+ For the treatment of wastewater with a mass concentration of less than 0.5g / L and low acidity, the leaching solution is diluted 4 times, and then subjected to liquid membrane extraction.

[0039] (2) Extraction by emulsion liquid membrane method

[0040] 1) Milking: According to the volume ratio, Span80 is 5%, TBP is 4%, liquid paraffin is 2%, and kerosene is 89%. Add the agent to the milk maker, stir at 500r / min f...

Embodiment 3

[0045] A method for extracting nickel from laterite ore by pressurized acid leaching-emulsion liquid membrane method, the process flow is:

[0046] (1) Pressurized sulfuric acid leaching

[0047] Laterite ore samples were added to the autoclave at a liquid-solid mass ratio of 7:1. The leaching temperature was controlled to 275°C, the leaching time was 90min, and the acid-ore ratio was 0.5 for leaching; the mass concentration of nickel ions in the leaching solution was 1.81g / L, acidity It is 30g / L. Because this emulsion liquid membrane system is more suitable for Ni 2+ For the treatment of wastewater with a mass concentration of less than 0.5g / L and low acidity, the leaching solution is diluted 5 times and then subjected to liquid membrane extraction.

[0048] (2) Extraction by emulsion liquid membrane method

[0049] 1) Milking: According to the volume ratio, Span80 is 5%, TBP is 4%, liquid paraffin is 2%, and kerosene is 89%. Add the agent to the milk maker, stir at 500r / min for 5mi...

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Abstract

The invention relates to a pressure acid leaching-emulsion liquid membrane method for extracting nickel from laterite. The method adopts a heating-centrifugation combined demulsification method, and reaches an emulsion breaking rate of 98%; the oil phase can be reused; after repeated use, the liquid membrane can realize an extraction efficiency up to 80%. The invention promotes clean production technology of pressure acid leaching of nickel laterite, and is innovative.

Description

Technical field [0001] The invention relates to the field of laterite ore extraction, in particular to a method for extracting nickel from laterite ore by a pressurized acid leaching-emulsion liquid membrane method. Background technique [0002] The grade of nickel in nickel-containing laterite ore is low, and it is not suitable for pyrometallurgical smelting, and hydrometallurgical processes are often used; there have been a lot of studies in the existing technology. [0003] CN102634655A relates to a chlorination leaching method for sulfide deposits of laterite ore. Through chlorination leaching, an in and out liquid enriched in metallic nickel can be directly entered into a nickel production system. The specific process flow is as follows: (1) Sulfide the laterite ore The mass ratio of sediment to water is 2~6:1, and chlorine gas with a pressure of 0.1~0.5Mpa is introduced; (2) Chlorine leaching is controlled: the ratio of leaching liquid to solid is controlled to be 2~6:1, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B3/26C22B23/00
CPCY02P10/20
Inventor 华兆红
Owner 无锡市森信精密机械厂
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